When you modify a brush in 'Geometry Editing panel, the pivot of the brush is decentralized. This is very bad for a future edition.
If anyone out there using/used the CryEngine, know that when the pivot is decentralized, there is a button called ‘Reset Xform’, which centered pivot with the Solid, this is very useful I think.
It would be interesting to have this option in Unreal 4.
Thanks for the feed back! This exact issue has been submitted as a feature request to our developers and is currently being considered. With any luck you may see this in a future update.
In the meantime, you can Middle Mouse Wheel click on the white ball of the pivot and move it that way. Or right click on the object > Pivot > Center On Selection. Unfortunately this only moves the pivot until you click off of the object and then it resets.